{"id":"CVE-2021-39173","aliases":["EUVD-2021-1857","GHSA-r67m-m8c7-jp83"],"status":"published","title":"Forced reinstall","description":"Cachet is an open source status page system. Prior to version 2.5.1 authenticated users, regardless of their privileges (User or Admin), can trick Cachet and install the instance again, leading to arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving the middleware `ReadyForUse`, which now performs a stricter validation of the instance name. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.02362,"percentile":0.83998,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-704"],"published":"2021-08-27T23:00:09Z","modified":"2026-10-20T10:54:53Z","fixes":[{"ecosystem":"Packagist","package":"cachethq/cachet","fixed_in":["2.5.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"cachethq/cachet","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.1"}]}]},{"source":"osv","ecosystem":"Packagist","package":"cachethq/cachet","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.1"}]}],"versions":["v0.1.0-alpha","v1.0.0","v1.1.0","v1.1.1","v1.2.0","v1.2.1","v2.0.0","v2.0.0-RC1","v2.0.0-RC2","v2.0.0-RC3","v2.0.0-RC4","v2.0.0-RC5","v2.0.0-beta1","v2.0.0-beta2","v2.0.1","v2.0.2","v2.0.3","v2.0.4","v2.1.0","v2.1.0-RC1","v2.1.0-RC2","v2.1.1","v2.1.2","v2.2.0","v2.2.0-RC1","v2.2.1","v2.2.2","v2.2.3","v2.2.4","v2.3.0","v2.3.0-RC1","v2.3.0-RC2","v2.3.0-RC3","v2.3.0-RC4","v2.3.0-RC5","v2.3.0-RC6","v2.3.1","v2.3.10","v2.3.11","v2.3.12","v2.3.13","v2.3.14","v2.3.15","v2.3.16","v2.3.17","v2.3.18","v2.3.2","v2.3.3","v2.3.4","v2.3.5","v2.3.6","v2.3.7","v2.3.8","v2.3.9","v2.4.0","v2.4.1"]}],"products":[{"vendor":"cachethq","product":"cachet"},{"vendor":"catchethq","product":"catchet"},{"vendor":"fiveai","product":"cachet"}],"references":[{"url":"https://github.com/fiveai/Cachet/releases/tag/v2.5.1","tags":["x_refsource_MISC","x_transferred","Release Notes","Third Party Advisory","advisory","web"]},{"url":"https://github.com/fiveai/Cachet/security/advisories/GHSA-r67m-m8c7-jp83","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39173","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-r67m-m8c7-jp83"},{"url":"https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection","tags":["web"]},{"url":"https://github.com/fiveai/Cachet","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-39173","title":"Forced reinstall","description":"Cachet is an open source status page system. Prior to version 2.5.1 authenticated users, regardless of their privileges (User or Admin), can trick Cachet and install the instance again, leading to arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving the middleware `ReadyForUse`, which now performs a stricter validation of the instance name. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.","status":"published","published":"2021-08-27T23:00:09Z","modified":"2024-08-04T01:58:18.192Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-704"],"updated_at":"2026-11-02T14:33:09.540052Z"}],"euvd":[{"id":"EUVD-2021-1857","description":"Cachet is an open source status page system. Prior to version 2.5.1 authenticated users, regardless of their privileges (User or Admin), can trick Cachet and install the instance again, leading to arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving the middleware `ReadyForUse`, which now performs a stricter validation of the instance name. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.","status":"published","published":"2021-08-27T23:00:09Z","modified":"2024-08-04T01:58:18Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T03:24:24.305495Z"}],"ghsa":[{"id":"GHSA-r67m-m8c7-jp83","title":"Cachet vulnerable to forced reinstall","description":"### Impact\n\nAuthenticated users, regardless of their privileges (_User_ or _Admin_), can trick Cachet and install the instance again, leading to arbitrary code execution on the server.\n\n### Patches\n\nThis issue was addressed by improving the middleware `ReadyForUse`, which now performs a stricter validation of the instance name. \n\n### Workarounds\n\nOnly allow trusted source IP addresses to access to the administration dashboard.\n\n### References\n\n- https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection\n\n### For more information\n\nIf you have any questions or comments about this advisory, you can contact:\n- The original reporters, by sending an email to vulnerability.research [at] sonarsource.com;\n- The maintainers, by opening an issue on this repository.\n","status":"published","published":"2021-08-30T16:11:33Z","modified":"2023-01-28T05:01:12Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-704"],"updated_at":"2026-11-02T14:36:22.592333Z"}],"nvd":[{"id":"CVE-2021-39173","description":"Cachet is an open source status page system. Prior to version 2.5.1 authenticated users, regardless of their privileges (User or Admin), can trick Cachet and install the instance again, leading to arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving the middleware `ReadyForUse`, which now performs a stricter validation of the instance name. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.","status":"published","published":"2021-08-27T23:15:06.957Z","modified":"2026-06-17T04:03:14.79Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-704"],"updated_at":"2026-11-02T14:06:57.67549Z"}],"osv":[{"id":"CVE-2021-39173","description":"Cachet is an open source status page system. Prior to version 2.5.1 authenticated users, regardless of their privileges (User or Admin), can trick Cachet and install the instance again, leading to arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving the middleware `ReadyForUse`, which now performs a stricter validation of the instance name. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.","status":"published","published":"2021-08-27T23:15:06.957Z","modified":"2026-10-20T10:54:53.784925557Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:20.843843Z"},{"id":"GHSA-r67m-m8c7-jp83","title":"Cachet vulnerable to forced reinstall","description":"### Impact\n\nAuthenticated users, regardless of their privileges (_User_ or _Admin_), can trick Cachet and install the instance again, leading to arbitrary code execution on the server.\n\n### Patches\n\nThis issue was addressed by improving the middleware `ReadyForUse`, which now performs a stricter validation of the instance name. \n\n### Workarounds\n\nOnly allow trusted source IP addresses to access to the administration dashboard.\n\n### References\n\n- https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection\n\n### For more information\n\nIf you have any questions or comments about this advisory, you can contact:\n- The original reporters, by sending an email to vulnerability.research [at] sonarsource.com;\n- The maintainers, by opening an issue on this repository.\n","status":"published","published":"2021-08-30T16:11:33Z","modified":"2026-07-08T06:27:35.540114512Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-704"],"updated_at":"2026-11-02T15:46:55.480549Z"}]}}